Cuban Missile Crisis: Blockade as the Only Option?
A student is investigating the claim: 'During the Cuban Missile Crisis, President Kennedy chose the naval blockade because it was the only option that avoided nuclear war.' The student has two sources. Source A is a transcript excerpt from an ExComm meeting on 16 October 1962. A military adviser argues that an air strike could destroy the missiles with 'acceptable' casualties; Kennedy replies that a surprise attack would be 'a Pearl Harbor in reverse' and asks what happens if the Soviets respond in Berlin. Source B is a 1971 memoir by a former special assistant. He recalls that the blockade was chosen because it gave Khrushchev 'time to climb down' and that the air strike was rejected as reckless. The memoir was written after the author had left government and after the 1968 Prague Spring. The student must evaluate the reliability of each source for explaining the decision, and decide how far the sources support the claim.
1. Assess the reliability of Source B for explaining why the blockade was chosen.
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Source B is less reliable than it appears for explaining the decision. It is a memoir written nine years after the crisis, after the author had left government and after later events (the 1968 Prague Spring) had changed how officials remembered Kennedy's restraint. Memoirs are shaped by hindsight, loyalty, and the desire to justify the author's role. The claim that the blockade gave Khrushchev 'time to climb down' may be a retrospective rationalisation; it presents the outcome as the intention. It is still useful for showing how participants constructed the story, and it can be checked against Source A. But for the decision itself, the contemporaneous ExComm transcript is stronger evidence.
2. How does Source A complicate the claim that the blockade was the only option that avoided nuclear war?
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Source A complicates the claim because it shows that the blockade was not the only option on the table and that the decision was contested. The military adviser's argument for an air strike, with 'acceptable' casualties, means the choice was not simply between blockade and nuclear war. Kennedy's 'Pearl Harbor in reverse' remark shows he feared the political and escalation costs of a surprise attack. The transcript reveals uncertainty and bargaining, not a clean choice of the only safe option. It also shows that the blockade was itself a coercive military act, not a passive alternative. So the claim that it was 'the only option that avoided nuclear war' is too simple; it was one option among several, chosen for political and strategic reasons.
3. What additional evidence would a historian need before accepting the claim? Explain why the two sources are insufficient.
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A historian would need the full ExComm transcripts, Soviet records (including Khrushchev's letters and Presidium discussions), and evidence of the secret Jupiter missile trade. They would also need to know whether the military adviser's casualty estimate was contested. Without Soviet sources, the claim that the blockade avoided nuclear war is one-sided. Memoirs and transcripts show American decision-making but not the Soviet response, which is central to the claim. The two sources are insufficient because they represent only the American side and, in Source B, a retrospective account. A judgement about 'avoiding nuclear war' requires evidence about both sides' calculations and about how close military confrontation actually came.